DE112013004164T5 - Exhaust component mounting system - Google Patents

Abstract

An exhaust treatment system having an exhaust pipe communicating with an exhaust producing engine. An exhaust tank is connected to the exhaust pipe, and the exhaust tank carries in its interior a plurality of exhaust treatment components for the treatment of the exhaust gas, wherein the exhaust tank is removable from the exhaust pipe and the exhaust treatment components are removable from the exhaust tank.

Description

TERRITORY

The present invention relates to an exhaust gas component mounting system.

BACKGROUND

This section contains background information that is not necessarily prior art.

It is known that internal combustion engines produce emissions that can be harmful to the environment. In an effort to reduce the potential environmental impact of such an internal combustion engine, exhaust aftertreatment systems have undergone extensive evaluation and development. Various components that contribute to the treatment of engine emissions include oxidation and reduction catalysts that chemically react with the exhaust gases to thereby produce less harmful emissions. Depending on the size of the engine application, the cost of such components can increase significantly. Larger engine applications such as in locomotives and ships and high performance stationary applications can therefore produce significantly higher exhaust emissions than, for example, the prime mover of a truck. For this reason, the exhaust aftertreatment systems are generally designed to be larger in size so that the harmful emissions from such large-scale applications can be satisfactorily reduced. With an increasing size of the exhaust aftertreatment system, however, a corresponding increase in costs for the manufacture, installation and maintenance of such a system is connected. For this reason, it would be desirable to have an exhaust aftertreatment system which is more conventional and yet capable of reducing the effects of harmful emissions from large scale engine applications.

OVERVIEW

The summary below, in which the invention is broadly summarized, is not an exhaustive or exhaustive description of all features of the invention.

The present invention provides an exhaust treatment system having an exhaust conduit communicating with an exhaust producing engine. An exhaust gas tank is connected to the exhaust pipe, and in the exhaust gas tank, a plurality of exhaust gas treatment components for the treatment of the exhaust gas is stored, wherein the exhaust gas tank is removable from the exhaust pipe and the exhaust gas treatment components are removable from the exhaust gas tank.

The exhaust treatment components may be disposed in an area in the container.

The exhaust pipe may define a flow direction, and the exhaust tank may be removed from the exhaust pipe in a direction orthogonal to the flow direction, while the exhaust treatment components may be removed from the exhaust tank in a direction coaxial with the flow direction.

The exhaust treatment components are each at least one component selected from the group consisting of oxidation catalysts (DOC), particulate filters (DPF), and selective catalytic reduction (SCR) catalysts.

The exhaust treatment components may each comprise at least one oxidation catalyst (DOC), at least one diesel particulate filter (DPF), and at least one selective catalytic reduction (SCR) catalyst.

The exhaust gas treatment system may also include a burner, which is connected upstream of the exhaust gas tank.

Further, the exhaust treatment system may include at least one injector for introducing an exhaust treatment fluid into the exhaust gas.

The exhaust treatment fluid may be a hydrocarbon exhaust treatment fluid and / or a urea exhaust treatment fluid.

The exhaust tank may include an inlet and an outlet, each connected to the exhaust conduit, and a housing disposed between the inlet and the outlet, the housing being removable from the exhaust conduit.

The exhaust gas tank may be fixedly connected to the inlet and the outlet by means of clamps.

The housing may include a plurality of shells disposed in the housing and supported by at least one partition wall.

Each of the trays may receive a cartridge containing the exhaust treatment component.

Finally, each of the cartridges may be fixed to the cups by a clamp.

Other applications will become apparent from the following description. The Description and specific examples in this overview are for illustrative purposes only and are not intended to limit the scope of the present invention.

DRAWINGS

The drawings described herein are merely illustrative of selected embodiments and not all possible implementations and are not limiting of the scope of the present disclosure.

1 is a schematic representation of an exhaust system according to a principle of the present invention;

2 is a front perspective view of an exhaust gas component according to a principle of the present invention;

3 is a sectional view of the exhaust gas component along the line 3-3 of 2 ;

4 is a sectional view of the exhaust component mounting along the line 4-4 of 3 ; and

5 FIG. 10 is a sectional view of a portion of an exhaust gas component mounting system taken along line 5-5 in FIG 3 ,

Matching numerals in the various drawing views identify matching elements.

LONG DESCRIPTION

Exemplary embodiments will now be described in detail, with reference to the accompanying drawings.

1 shows schematically an exhaust system 10 according to the present invention. The exhaust system 10 includes at least one prime mover 12 that with a fuel source 14 communicates and which produces exhaust gases at fuel consumption, which in an exhaust pipe 16 with an exhaust aftertreatment system 18 be ejected. The prime mover 12 may be a diesel oxidation catalyst (DOC) component 20 , a diesel particulate filter component (DPF component) 22 and a component for selective catalytic reduction (SCR component) 24 be downstream. The exhaust aftertreatment system 18 can also components such as a burner 26 included to a temperature of the exhaust pipe 16 to increase flowing gas. An increase in the temperature of the exhaust gas is advantageous if it is to be achieved that the catalyst in the DOC and SCR components 20 and 24 in cold weather or when starting the engine 12 and is also beneficial for initiating regeneration of the DPF 22 if necessary. To supply the burner 26 With fuel, the burner can have an intake pipe 28 that with the fuel source 14 communicates.

The DPF 24 may be desirable as an exhaust treatment component to soot and others in the exhaust gas 14 filter existing particles. If soot or other particles begin to foul the fine pores (not shown) of the DPF 24 to clog, the DPF can 24 be cleaned by increasing the exhaust gas temperature to the DPF 24 free from excessive soot and other particulate matter. For the above reasons, the burner 26 the DOC 20 , the SCR 24 and the DPF 22 preferably in each case upstream. It is understood, however, that the DPF 22 both the DOC 20 as well as the SCR 24 can be upstream and has its own burner for regeneration purposes, while a second burner (not shown) both the DOC 20 as well as the SCR 24 can be upstream. Another alternative is the arrangement of a separate burner for the DOC 20 , the SCR 24 and the DPF 22 ,

To support the reduction of the drive machine 12 produced emissions can be the exhaust aftertreatment system 18 injectors 30 and 32 for periodically injecting exhaust treatment fluids into the exhaust stream. As in 1 is shown, the injector 30 the DOC 20 can be upstream and can be effective for the injection of a hydrocarbon exhaust treatment fluid that supports at least the reduction of NO _x in the exhaust stream. In view of this, the injector stands 30 through the inlet pipe 34 in fluid communication with the fuel source 14 to add a hydrocarbon such as diesel fuel to the DOC 20 Inject upstream exhaust pipe. The injector 30 can also have a return line 36 with the fuel source 14 keep in touch. The return line 36 allows recirculation of hydrocarbon that has not been injected into the exhaust stream to the fuel source 14 , The hydrocarbon stream through the inlet line 14 , the injector 30 and the return line 36 also supports the cooling of the injector 30 so that the injector 30 not overheated. Other forms of cooling are also contemplated. For example, the injector may be provided with a cooling jacket (not shown) for cooling the injector 30 is flowed through by a coolant.

The injector 32 can be used to inject an exhaust treatment fluid such as urea at an upstream of the SCR 24 located in the exhaust pipe. The injector 30 stands over the inlet pipe 40 with a reducing agent tank 38 in connection. The injector 32 is also about the return line 42 with the container 38 in connection. The return line 42 allows recirculation of urea that has not been injected into the exhaust stream to the container 38 , Similar to the injector 30 supports the flow of urea through the inlet pipe 40 , the injector 32 and the return line 42 also the cooling of the injector 32 so that the injector 32 not overheated. Similar to the injector 30 can also be the injector 32 be provided with a cooling jacket (not shown).

Large diesel engines, such as those used in locomotives, ships, and stationary applications, may have exhaust flow rates that exceed the capacity of a single injector. Therefore, according to the invention, of course, several injectors for the hydrocarbon and several injectors for the urea can be considered, although only one injector 30 for the hydrocarbon and only one injector 32 are shown for the urea.

To control the various features of the exhaust system 18 that the prime mover 12 and the exhaust aftertreatment system 18 includes, a control unit 44 be provided. In particular with regard to the control of elements of the exhaust treatment system 18 can the control unit 44 be suitable for the control of the burner 26 and the injectors 30 and 32 , To control each of these elements may be at positions throughout the exhaust treatment system 18 Various sensors (not shown) may be arranged to monitor, for example, the exhaust gas temperature, NOx concentration, pressure, volumetric flow, temperature and pressure of the exhaust treatment fluid, and the like.

In large engine applications, such as in locomotives, ships, and even stationary applications, the production of the various exhaust treatment components may, due to the extent necessary, effectively treat large quantities of exhaust gas during operation of the prime mover 12 be produced, be unaffordable. Under these circumstances, it can be very expensive, the ceramic substrates such as the DOC 20 , the DPF 22 and the SCR 24 to produce. If the DOC 20 , the DPF 22 and the SCR 24 in very large sizes, the production costs can be extremely high. For this reason, instead of producing large exhaust treatment components that are adapted in size to large engine applications, exhaust flow to a plurality of exhaust pipes may occur 16 be split, each of which is a burner element 26 , a DOC element 20 , a DPF element 22 and an SCR element 24 contains, whose size corresponds more to the usual size.

Instead of dividing the exhaust gas flow to a plurality of exhaust pipes 16 that are compatible with common sizes of the DOC element 20 , the DPF element 22 and the SCR element 24 instead of producing potentially prohibitive, large-scale exhaust treatment components 20 . 22 and 24 can the exhaust system 18 as alternative areas of the exhaust system components included. In the 2 to 5 for example, is an exhaust system tank 50 shown having a variety of exhaust treatment components 20 . 22 or 24 that absorbs in one area 25 are arranged. In the illustrated embodiment, the exhaust treatment components are DPFs 22 However, this invention should not be limited thereto. It is understood in this context that other exhaust treatment components such as DOCs 20 and SCRs 24 in an exhaust system tank 50 can be accommodated without departing from the scope of the present invention. Furthermore, the exhaust system tank 50 at least one of each of the exhaust system components 20 . 22 and 24 contain. That is, the exhaust system tank 50 Can at least one DOC 20 , at least one DPF 22 and at least one SCR 24 without departing from the scope of the present invention.

The exhaust tank 50 can an inlet 52 and an outlet 54 exhibit. As the 2 to 5 can show the inlet 52 and the outlet 54 each should be shaped like a cone, but this invention should not be so limited. In particular, the inlet can 52 and the outlet 54 be a parallelepiped or have another known or desired by the expert form. Regardless of the shape of the inlet 52 and the outlet 54 can the inlet 52 and the outlet 54 one flange each 56 have, the openings 58 for holding bolts or screws for securing the exhaust tank 50 at the exhaust pipe 16 Has.

Between the inlet 52 and the outlet 54 there is a housing 60 containing a variety of exhaust treatment devices 20 . 22 or 24 supports. As shown, the housing may be cylindrical or have another shape known or contemplated by those skilled in the art. For example, the housing 60 be cubic, be a parallelepiped or have another known or desired shape. Regardless, the case may 60 according to the invention radially (ie in a direction orthogonal to the exhaust gas flow) from the inlet 52 and the outlet 54 be solved. In view of this is the case 60 through the use of clamps 62 both at the inlet 52 as well as at the outlet 54 preferably clamped. Because the case 60 both from the inlet 52 as well as from the outlet 54 can be solved, the housing can be 60 from the exhaust treatment system 18 remove if the exhaust treatment components stored in the housing must be replaced, cleaned or repaired.

After loosening the clamps 62 can the case 60 between the inlet 52 and the outlet 54 be lifted out while both the inlet 52 as well as the inlet 54 with the exhaust pipe 16 stay connected. For gripping the case 60 to the housing between the inlet 52 and the outlet 54 The case can stand out 60 with a handle or a hook 64 be provided, which allows a person or a lifting mechanism, the housing 60 between the inlet 52 and the outlet 54 lift out. That way, it's easier to keep that in the case 60 stored exhaust system components 20 . 22 or 24 to clean, replace or repair, since not the entire container 50 from the exhaust treatment system 18 must be removed. The use of terminals 62 It also aids in easier repair, replacement or cleaning of the exhaust system components 20 . 22 or 24 because the case 60 not with bolts or other types of fasteners, the removal of which is time consuming, at the inlet 52 and at the outlet 54 is attached.

About the radial removability of the container 60 from the inlet 52 and the outlet 54 In addition, the exhaust treatment components 20 . 22 or 24 axially from the housing 60 be removed. In this regard, in the case 60 a partitioning system arranged, one at the inlet 52 adjacent first partition 66 and one to the outlet 54 adjacent second partition 68 includes. The first and the second partition 66 and 68 support a variety of shells 70 each having a respective exhaust treatment component 20 . 22 or 24 record and hold. The bowls 70 are at the respective partition 66 and 68 fastened, preferably by welding, soldering or other fastening mechanisms. About her attachment to the bowls 70 In addition, the first and the second partition 66 and 68 by welding, soldering or other fastening mechanisms also preferably on the housing 60 attached. Although a pair of partitions 66 and 68 is used to the shells 70 of course, can only support a partition 66 or more than a pair of partitions 66 and 68 be considered.

Every exhaust component 20 . 22 or 24 can in a cartouche 72 contained in a respective shell 70 is recorded. The cartridges can do this 72 in the bowls 70 be inserted. Once the cartridges 72 in the bowls 70 are used, the cartridges can 72 through the use of clamps 74 at the first, the inlet 52 adjacent end 76 on the bowls 70 be secured. Because the second end 78 not by means of clamps 74 on the shell 70 is secured, a junction between the second end acts 78 and the shell 70 as a thermal sliding joint, which allows the cartridges 72 and bowls 70 during use of the exhaust treatment system 18 expand and contract. Similar to the case 60 that by means of clamps 62 at the inlet 52 and at the outlet 54 attached and therefore easily from the exhaust treatment system 18 can also be solved, the exhaust gas treatment components 20 . 22 or 24 in the axial direction (ie, in a direction of the exhaust gas flow) easily from the housing 60 be solved by the cartridges 72 by means of terminals 74 at the switches 70 are fixed. That means that through the use of clamps 74 instead of bolts or other types of fasteners, the release of which may be otherwise expensive, it is ensured that any exhaust gas components 20 . 22 or 24 in the case 60 stored, easily removed, then cleaned, replaced or repaired, which is why long non-use phases during maintenance of the exhaust treatment system 18 in a prime mover 12 that the exhaust treatment system 18 uses, avoid.

As in the 2 to 5 is shown, the cartridge 72 and the shell 70 one flared edge each 80 and 90 exhibit. In this case, the first end has 76 the cartouche 72 a larger diameter than the second end 78 , and the inlet area 92 the Bowl 70 has a larger diameter than the outlet area 94 , The flared edges 80 and 90 may have the same diameter, so that the contact between the edges of an improper placement of the cartridge 72 in the bowl 70 prevented. Because the edges 80 and 90 also have the same diameter, forming the flared edges 80 and 90 in close proximity to each other (when viewed in cross section, such as in 5 ) substantially planar connection for the terminal 74 for the merger of the shell 70 and the cartouche 72 during use of the exhaust treatment system 10 ,

In addition, the flared edge 80 An institution 81 for gripping, which in the illustrated embodiment in the form of an opening 83 may be provided to allow a person the cartridge 72 grab and out of the shell 70 can remove. The feature 81 can also be defined by a hook or a handle (not shown) for a person to use the cartridge 72 grab and out of the shell 70 can remove.

Between the cartouche 72 and the exhaust treatment device 20 . 22 or 24 can an insulating mat 96 be arranged. The insulating mat 96 is effective as a thermal barrier between the substrates 82 of the DOC 20 , the DPF 22 or the SCR 24 and the cartouche 72 to keep the heat during operation of the exhaust treatment system 18 in the cartouche 72 remains so that sufficient catalytic reactions in the DOC 20 or SCR 24 take place, or to ensure that one for the support of the regeneration of the DPF 22 sufficient heat is maintained.

The foregoing description of the embodiments is for illustrative purposes only and is neither exhaustive nor limiting of the disclosure of the invention. Particular elements or features of a particular embodiment are not generally limited to this particular embodiment, but may be interchangeable and may be used in a selected embodiment, unless expressly shown or described otherwise. Likewise, these elements and features may be varied in many ways without departing from the scope of the disclosure, all of which modifications are included within the scope of the disclosure.

Claims (26)

Exhaust gas treatment system comprising: an exhaust pipe communicating with an exhaust-producing engine; and an exhaust treatment tank connected to the exhaust pipe, wherein the exhaust treatment tank carries a plurality of exhaust treatment components for the treatment of the exhaust gas, wherein the exhaust treatment tank is removable from the exhaust pipe and the exhaust treatment components are removable from the exhaust treatment tank. The exhaust treatment system according to claim 1, wherein the exhaust treatment components are disposed in an area in the exhaust treatment tank. The exhaust treatment system according to claim 1, wherein the exhaust passage defines a flow direction, wherein the exhaust treatment tank is detachable from the exhaust passage in a direction orthogonal to the flow direction. The exhaust treatment system of claim 3, wherein the exhaust treatment components are removable from the exhaust treatment canister in a direction coaxial with the flow direction. The exhaust treatment system of claim 1, wherein the exhaust treatment components are each at least one component selected from the group consisting of oxidation catalysts (DOC), particulate filters (DPF), and selective catalytic reduction (SCR) catalysts. Exhaust treatment system according to claim 5, wherein the exhaust gas treatment components each contain at least one oxidation catalyst (DOC), at least one particulate filter (DPF) and at least one catalyst for selective catalytic reduction (SCR). Exhaust treatment system according to claim 1, further comprising a burner upstream of the exhaust gas tank. The exhaust treatment system of claim 1, further comprising at least one injector for introducing an exhaust treatment fluid into the exhaust gas. The exhaust treatment system of claim 8, wherein the exhaust treatment fluid is a hydrocarbon exhaust treatment fluid. The exhaust treatment system of claim 1, wherein the exhaust treatment fluid is a urea exhaust treatment fluid. The exhaust treatment system of claim 1, wherein the exhaust treatment tank has an inlet and an outlet, each connected to the exhaust pipe, and a housing disposed between the inlet and the outlet, the housing being removable from the exhaust pipe. The exhaust treatment system of claim 11, wherein the housing is fixedly connected to the inlet and the outlet by means of clamps. The exhaust treatment system of claim 11, wherein the housing includes a plurality of shells disposed in the housing and supported by at least one bulkhead. The exhaust treatment system of claim 13, wherein each of the shells receives a cartridge containing the exhaust treatment component. Exhaust treatment system according to claim 14, wherein each cartridge is fixed by means of a clamp on the shells. The exhaust treatment system of claim 14, wherein the cartridge has first and second ends, the first end having a diameter greater than a diameter of the second end. The exhaust treatment system of claim 16, wherein the first end is fixed to the shell and a joint between the second end and the shell defines a thermal slip joint. Exhaust gas treatment system comprising: an exhaust pipe communicating with an exhaust-producing engine; and an exhaust treatment tank connected to the exhaust pipe, the exhaust treatment tank including an exhaust treatment component mounting structure disposed therein; and at least one exhaust treatment component detachably connected to the exhaust treatment component mounting structure. The exhaust treatment system according to claim 18, wherein the exhaust treatment component mounting structure comprises a partition attached to an inner surface of the exhaust treatment tank and a shell fixed to the partition suitable for receiving the exhaust treatment component. Exhaust treatment system according to claim 19, wherein the exhaust gas treatment component is received by a cartridge, which is pushed into the shell and fixed to the shell. The exhaust treatment system of claim 20, wherein a first end of the cartridge has a larger diameter than a second end of the cartridge. The exhaust treatment system of claim 21, wherein the first end is fixed by a clamp to the shell and a joint between the second end and the shell defines a thermal slip joint. The exhaust treatment system of claim 21, wherein the diameter of the first end is greater than a diameter of the shell. The exhaust treatment system of claim 21, wherein the first end comprises gripping means. The exhaust treatment system of claim 21, wherein the shell has an inlet portion with a first diameter and an outlet portion with a second diameter and wherein the first diameter is equal to a diameter of the first end of the cartridge. The exhaust treatment system of claim 25, wherein the first end and the inlet region form a maintainable clamp connection.

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